Jeep 1995-2000 4.0 Liter Motor Oil Filler Cap on Valve Cover 1-7/32" diameter Jeep Wrangler (YJ) (1995) w/ 4.0L & w/ 1-7/32" diam. Twist on threads. All Jeeps (1996-2000) w/ 4.0L & w/ 1-7/32" diam. Twist on threads. All Jeeps (1993-1998) w/ 5.2 or 5.9L engine.